MCQ
Velocity of center of mass in the absence of external force
- Azero
- ✓constant
- Cwill increase
- Dwill decrease
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.


($A$) $l=\sqrt{\left(\frac{n q^2}{\varepsilon k_B T}\right)}$
($B$) $l=\sqrt{\left(\frac{\varepsilon k_B T}{n q^2}\right)}$
($C$)$l=\sqrt{\left(\frac{q^2}{\varepsilon n^{2 / 3} k_B T}\right)}$
($D$) $l=\sqrt{\left(\frac{q^2}{\varepsilon n^{1 / 3} k_B T}\right)}$